Production and characterization of a tool steel-PSZ composite by mechanical alloying and spark plasma sintering

被引：12

作者：

Deirmina, Faraz ^{[1
]}

Pellizzari, Massimo ^{[1
]}

机构：

[1] Univ Trento, Dept Ind Engn, Via Sommar 9, I-38123 Trento, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 709卷

关键词：

Steel matrix composite; Partially stabilized zirconia; Mechanical alloying; Spark plasma sintering; Microstructure; Hardness; METAL-MATRIX COMPOSITES; THERMAL-EXPANSION; STABILIZED ZIRCONIA; FRACTURE-TOUGHNESS; PARTICLE-SIZE; TRIP STEEL; BEHAVIOR; NANOCRYSTALLINE; MICROSTRUCTURE; TRANSFORMATION;

D O I：

10.1016/j.jallcom.2017.03.203

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tool steel matrix composites show improved hardness and remarkable wear resistance but generally also a systematic lower fracture toughness than the base material. The present work deals with the feasibility and characterization of a powder metallurgical hot work tool steel reinforced with partially stabilized zirconia (PSZ). Selection of PSZ as the reinforcement is aimed at improving the strength and fracture toughness of the composite by taking advantage of the transformation toughening effect of PSZ. The specimens were produced by mechanical alloying (MA) followed by spark plasma sintering (SPS) using two different types of PSZ, different volume fractions (10 and 20 vol %) and sizes of reinforcement. The influence of processing parameters on density and microstructure was investigated. The chemical stability of the tool steel-PSZ system was also studied looking at the possible formation of complex oxides and precipitates during the fast consolidation by SPS. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：742 / 751

页数：10

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